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For ERP LN feature pack upgrade, what method of install are you using?
Installation Wizard into existing VRC
37%
Installation Wizard into new VRC
39%
Manual into existing VRC
3%
Manual into new VRC
21%
Total votes: 38

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4GL zoom.from sections
By patvdv at 26 Feb 2008 - 21:56

4GL zoom.from sections

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Tables
By patvdv at 26 Feb 2008 - 21:56

Tables

If you use database tables and records in your program, you must declare the tables as follows:

TABLE <table name> | table name must start with a 't'.

This declaration creates a pointer to the table. Declaration of a table implies declaration of all its fields and its record buffer. It is not necessary to declare these separately.

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Flow of 4GL engine
By patvdv at 26 Feb 2008 - 21:56


Flow of 4GL engine

This section presents the general flow of the 4GL engine. It is not complete, but the most important actions are included. The flow is similar for programs of types 1, 2, 3, and 4. Any differences are indicated by comments.

Main routine

The main routine displays the first form on the screen and waits for a command.

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The GOTO statement
By patvdv at 26 Feb 2008 - 21:56

The GOTO statement

The GOTO statement transfers control unconditionally to a specified point in the program. You use a label to indicate a position to which the statement can transfer control. The label name can consist of letters, digits, underscores [_], and periods [.]. It must begin with an alphabetic character.
Examples of labels:

LABEL_1:
START_OF_PROCESS_A:

Examples of GOTO statements:

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Programming a UI Script overview
By patvdv at 26 Feb 2008 - 21:56

Programming a UI Script overview

This section describes how to program a BAAN UI script.
When you create a session, the default behavior of that session is handled by the 4GL engine. If additional functionality is needed or default functionality needs to be by-passed, this should be programmed in a UI script.

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The IF ... THEN ... ELSE statement
By patvdv at 26 Feb 2008 - 21:56

The IF ... THEN ... ELSE statement

The IF statement enables conditional transfer of control. The statement tests a condition, and executes the succeeding statements only if the condition is true. The condition can consist of an expression, or it can be a long variable or a function that returns a long. When the condition is a long variable or a function that returns a long, the value zero is evaluated as FALSE and all other values are evaluated as TRUE.

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Comparison of doubles in queries
By patvdv at 26 Feb 2008 - 21:56

Comparison of doubles in queries

Problem description

The comparison of two doubles or floats inside queries is unreliable. For example, if a query contains the expression "double.col > 1.23" then a value may be returned which is equal to, or even slightly less than, 1.23. If an expression "double.col = 1.23" is in a query, and the database contains the value 1.23 it may, or may not be returned. This can lead to programs taking wrong decisions.

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The ON CASE statement
By patvdv at 26 Feb 2008 - 21:56

The ON CASE statement

This statement has the following syntax:

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Considerations on doubles
By patvdv at 26 Feb 2008 - 21:56

Considerations on doubles

In the related topics some extra information on double.cmp() is given.
For Baan 4GL engineers it is important to know that:

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Expressions and operators
By patvdv at 26 Feb 2008 - 21:56

Expressions and operators

An expression is a combination of variables, constants, and operators, built up in accordance with certain rules. There are two main kinds of operators: unary and binary. All operators, except the negation operators, are binary. Expressions with unary operators have the general form:

operator operand

Expressions with binary operators have the following form, where each operand can be another expression, variable, or constant:

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